κατασκώπτω
From LSJ
ἔγνω δὲ φώρ τε φῶρα καὶ λύκος λύκον → the thief knows the thief and the wolf knows the wolf, and thief knows thief and wolf his fellow wolf, set a thief to catch a thief
English (LSJ)
A make jokes upon, τινα Hdt.2.173; mostly in bad sense, jeer, mock, Id.3.37, 151.
German (Pape)
[Seite 1379] fut. κατασκώψομαι, verspotten, τινά, Her. 2, 173. 3, 151.